How is an outdoor thermostat used in a dual-fuel heat pump system?

A) The outdoor thermostat prevents the heat pump from operating above the balance point.
B) The outdoor thermostat prevents the furnace from operating above the balance point.
C) The outdoor thermostat prevents the heat pump from defrosting above the balance point.
D) The outdoor thermostat prevents the electric strip heat from operating above the balance point.


B

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